Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b5f447f61bd6fba599226fbcc80182b16fa0adae951e62832234004553bc8bba' 
  AND token = 'lGrWkqdigpht835FtDhAUfD2xWiIs2cNm3AKFmpWUJs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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