Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60a07e27a96de0a0f3a6f06e20267f2a1a8ebfbfa110b0cefa3f21ae763b73d6' 
  AND token = '3xjwnMdU3HV8RTzDiEa3NkyeR8j4c1Fn3VeeJwUD4Wg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00077

JSON explain

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