Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '219c991ab6754e5824fae6b1513c31f10daf51735d0876d100fdd40c7d04ac99' 
  AND token = 'FgJpfHAC6I3eMO4159D+Oeth1Nr8ilg0IVfkiXIllLE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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