Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f98b2a0244c514df152f17553038987947700d38aff34d132892b64b1bb3842' 
  AND token = 'MoLWr034v7Z+FrkiowTCicURJWic1vX2N6QeZwwjapI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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