SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '06185aa5fec1b405e50d8c22383c7481b149504a51131d28cfcfef679b63f110' 
  AND token = 'jOw6+sEOJKJ+JlzkhosSJLpvT3XQRYy8PKqY2iCn29k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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