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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '3feb3bca8d20fa9b47cb2d9d335151f9614f5f1570969b858571dfb1ad00a97c' 
  AND token = 'y2rqptr744HkOi3A2XS2A7pl85x5yTfYHI5IDiPhqOU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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