Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a3181903c08c746c11cdfdb4c3c2d81abaa5f3bd39efca6775429fd6e2db9e69' 
  AND token = '4VT1oubMzfMZTvCmPkoJBBWmXJI4He0881feF8UuROQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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