SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cbc2e24276b27d16044d8351539b6da6436d76c765c3103b0abd199292fde272' 
  AND token = 'F1QhzGWErr6SF9xrDLMrrjYooq3/mOK2HulHRXhAvPw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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