Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a5684b6be006391ee35cc63b2fcb580f260f7f610e0b3457494f06e2fdf57fb2' 
  AND token = '8KeoPBx6wARb16S44FDu43SMr6R7hVm4+2VBT45Goek=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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