SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd61ec0b2d231553c0ab1132f78738b6dd257f48ed3a7c34bae191e916a2d2fb8' 
  AND token = 'nfvt6Mns5pgpEGv/IRxSocCZ2F+jqtZeBxvuL3EyzhE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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