SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '25b624f768808efd45a3cc81cf23bd9498966f6578d693a73df3767a639a2153' 
  AND token = 'yrAF0Tqcbl0/hQQxLSqsrcsalYVsjVCCY+7DYLkUK8Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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