Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '520cfba1a7b2c25d9fe59048a346d826815809e8edf58c01633443982d26ae34' 
  AND token = '9iWI70niaU5kBynXatoeZPvu59x4DWXnp7G1S7xsSoE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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