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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'd37b7a77b9a48908c5a4ed1b7b485b79de3b267c4b15305f59ba9f114b49e4ed' 
  AND token = '2vKbk6FSGjFxj7jedecW/JdPrNYaC3s1a/t+wugVePw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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