Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f3f42f98dbe3c7e402feb8d033bff19e7f46626c2c66e60c84911fe057d9593' 
  AND token = 'eL/2UMuuT2xwDXZAu3oTMatjGiGYI9y8m/1r5/6ULR8=' 
  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"
    }
  }
}