Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '94968400ac5f5016eba51bf256d7f50be534b862d46e57653c42bc0f5b132d83' 
  AND token = 'k321pJdFOdfegW870OsJ3Cfs36B+pxsce4dnnmmtsVQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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