Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2df77ca8dc1d5d8766de6aeaf14fdb79d2a4feb86bd06889b331315d547feee' 
  AND token = 'C3bxajYdFXwsgU7IJaOhpnFFCKCd+rJmo19CRFlFsyY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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