SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f0a1d0e335e4c60ddf148c4d198f32acae999b581a8f85de1f609e3ffc990765' 
  AND token = 'EoRSj+akJz4AqvQ2d30rKSCyct/uhGKZMDBBEMOpUwg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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