Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '398c2d4c84eba15e25c4bc2ef54d0a1f05df6f6304ae51efce81cc1bde71d763' 
  AND token = 'om6Dx4AgYFkKhaemvEcbMmE/1VnoE7vIHp0RSEXfp1A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}