Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '73ec925e5460ea8c22c5dec1e43ff18b2ed62cfa8e7e3219a55cf37eb66a73c7' 
  AND token = 'Yk9soA4z1Drgv1v1Udo2negvWz9x/eHvPVYP6jwKXpY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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