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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dce040e960089055dbfcd2d51677aa01ab683ed3dedfe81cf4e0f24f507ef042' 
  AND token = '7EZ4PYsk1389QebIAeES4UHSRoqo6LTjNgY+DDKVJ6Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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