SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '965b4ae80b1b8a5dd7611f5cb981b710824a47bcf6a8d5a8c3d5b3aceb850c8e' 
  AND token = 'L/yDrqNFPLvwCrAjYSSf3ug+nqnVkdDH7rqx9KVBAAo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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