Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a016a664b37ed2256e9223358531948c8c68e1da95de804f111e9a6ce8c44d87' 
  AND token = 'P9RGC2Rja12rCeIzVTCeiFCRTkW3M+WhwYPhWItXFy8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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