Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '20fa2bccd3f3ae784ba625ec2185fbc23875f7af5a4a8c3c84a29d97c80a29b3' 
  AND token = 'Gh5fFPN7SV0rVpNjo6+mPA8QUZnPUUxz9pGMNHfS9m0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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