Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b10723e3432928f6703428bf354c6ac8ebf8cb8eec03af3ce1823f7218586ad8' 
  AND token = 'fyE6DUPV7WiEECrx8kqXzvwkc3NEC7jgfYIX4xrU9a0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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