SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '786035e07796ee78d1091d7f1c739c6684324c9ba6eba390927c7bd4f27f50ed' 
  AND token = 'z9nIFI/wivKq1VxbLAgY96LmZCEtG5HFqzSvF9aYLhc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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