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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd1bca6e110c4ed55b8f235f44379e7ffab8188ccbd271be6e419165427c144e9' 
  AND token = 'gE+XdSf2w52+0tKIdh4KhUd7yGjaJCFWeTVoqydiOXs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00099

JSON explain

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