Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e3eb1e058051b9420ae58c2fbdfd8812e2f5cc1c4bdacb4429b00da8ea17fc9' 
  AND token = 'eS9MEhXM5FY941jT3Tqm5+92jRyp9dz6j9kb5Ot2NGk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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