Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bcede7bc3962a548b331c7784ff4934a0bde24018ed948ac27a4e708fa07c764' 
  AND token = 'U1A2d5gEHzZ1bk9EvJ+/Re4rTIkSMQBBJXfjfTuRkhw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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