Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f79113c41fb6d17c8253223ffc390916eeb450501c850c9a3bc27ea1de3c4701' 
  AND token = 'B8hDPwvo3EHYtwF9wcwypTRKXWt1CWqodNNqcFgnPZo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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