SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'acf97af121d82f0281bc5a808db9f956336847e85467cb563cf1ba3e8f75875d' 
  AND token = 'JlYKSH+mFIr3PAwfPERrGqA9mSyAVXDpLuhYIb4SjdU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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