Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b6bd07acdd7440017a985bee505e4f610ffcfee518afafda7ebf6bcec156b7a' 
  AND token = 'OAnFapqltGbW+6Rmk7fYSBz28sOQJQdCF8K6eMZClWw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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