SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '699bf533ee8ef9d348d76c4932425ba5a12501974930272443a56e0d18d50ea5' 
  AND token = 'sBcYF8f+qC4pz+qYCFsqCKfhdkTzTPCQpbgwXIeXfbA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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