SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2a5e8698af6524f6f0ada55c3b82e73cb65d150daf3dbda4b152dd2e789c8d20' 
  AND token = 'BQGv9AMZrtkImPC7UW4jkPKOmOFY1/pe2RD4DgQgjYA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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