Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7f77d7d0ba0b6b968993498d9819e01ec91c50940b8b17773d275156c992e76' 
  AND token = 'SLAXmgZmdDlAlSGNRJ+pJnPfq676pXvZG9+M83RuJIc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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