Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '66097e376920e2b55a62a65047337fe6dcc780e8c406c4c4be703c539eb75fdc' 
  AND token = '/eC7BR17a3cPNGD/c+ldgrQGaPaBssp9nEnlCsKse40=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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