Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae6c4394570347f30be58feb0aadc94aadd569fbdd35b3f41ce8d515bcb2dfb5' 
  AND token = 'bzCkm2lOQti8Fx1Cg7uBJJGuY5Qu4weLfn0aY7i8s4c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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