Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ed1b7dd03df481a4947399249211a32a5c641f9b2d0cc6cd92ea6efaa56e45a' 
  AND token = 'K59htlcASSv9bg0E8AtSkYGwYIw+tY2kNqJOzVGGLKg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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