Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '554a4692cd237874f96ad7dd4f2c082f28c0f774ca10b87d470c288eabf10ee1' 
  AND token = 'nQZ2ai6qUf8I5jnVJn451kidpyJrJ2gazc8VMQfclbE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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