Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dbf4d5fc63083bea78fb186941dfdde768437a86ec0de7f9b21b7b357eaf90cf' 
  AND token = '7XGag1pjhOOFClVEX464ES8n6TLFqvuiR8ZQeo1K18o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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