Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '87a9627649cc3df246d2a63ed476196c7434140fba27598174f9b4e8bc0caab4' 
  AND token = 'oqOUj6rNRjjdYBnFSt8JRvLCiOD4mMMB866mLKDN0r0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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