Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c5ae362df3fd4dbd2236cff1e5877e7a6f5c9cb217f3e2ce14be16d24e6e4308' 
  AND token = '0oB+yrNcXZZMoPeDYOphaFjOcL/KFmITIb2DCaXyEbI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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