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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '47cdec83bdecc5155774b2a3e705aad11f3147a6b14060812193c3f312d3161d' 
  AND token = 'Y1yl6euahugv0hO3hlD9vHYzbz09Vxv2B/51RToDRbc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}