Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a8527bbcbf346496710ae67badc31d87e83d4174342ee7b4cb93d1a1c4b264fc' 
  AND token = 'C4yaWgCcWeEZZd01if8Np3WifTxtNzY/wsu/RS4Ro5o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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