Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd447e04c35fbfd85d64361a11ef422385a720893f86107c42d0dc18486a015bc' 
  AND token = 'duyu4Ulu8dHglFrHSGneCwVj+oMXzJ+TIuW86DFWOTY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00086

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}