Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e75307a6f1b430bae02a41ec23f8617c5dc806b9ac1caf4499945131cab944e7' 
  AND token = '7cTfVBdfHGlRzOU+PSgNF+vMk1db3ykbn0JZg57sMzc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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