Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '63b56486def6222dac28674df3f0e09ceb8049af6018cb1774e04299e42d03ac' 
  AND token = 'YV/JKEOr9vuQFmuEzXex7quukEefQLMU6QLMobHLdcE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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