Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6894a71e3f0ab8f6b1164212a4c02c3936a8e4966926b9be98491c63eed08c97' 
  AND token = '4PQJpV6wCozb6Awjl1cGj+V/Df4HICeUBJ6VFTa0L5g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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