Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b67fa8364fb0987a6e7617719f44fef534abf0eed97fbd814086ad3ab0eaf5c0' 
  AND token = '7ezHpCXDWOYebc1dUIrOBnpyFcO7Blm62yiLCn2vCrM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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