SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4c27bab260e191dfb39c3a8625ecc3249362f44708e9d7ed0267d3b9c9bf9147' 
  AND token = 'GpRixhGaI1V+AVU4uqHHvrKlOfHhwwO8KDRryntAlqQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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