Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0ca6a0e95e68a0ecc525fc956c77a9dab45cac6434a767784564baf1ad4a687' 
  AND token = 'kwFSwgEk6z64Vt9kgGLONYJxZgplYWWGUzWafYwbCW0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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