Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8b1d618ef556cefebb200b37b8698ef4b248f2302f338b0c9b68aae780ef7f9' 
  AND token = 'G3urkOw51oGWT+cwd05D4n/cnhjFnSmVkekIIXpRDcI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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