Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c60df136568f08b77c762bb8e667ee7b6b180b0d34b431217ee509e1a52f33fa' 
  AND token = 'DQFBLmrQ3Jj/m+0uGe7RiwuRLOgs9/e8BR48fMOlub0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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