Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c8566aacf1119126e8afcb0f726344cc1358f27c8e02ebbc5cdc6399084a31c7' 
  AND token = 'i7Bz3JXsdfO5cLFxgZizmIMfDRapL/giOPFP0/LhP0s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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