Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2c7c327725c8b02078a4c94b187eb1a5c096b955c80b4fc495e2a0dfcd062a3' 
  AND token = 'BlLZSWQlwlmXCpdw0Y82tfwPjiYCW6Zs5fbROyuZ7k4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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