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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '562a07cfa4e0c7f51ab33d223dace82325e1cc13ba5038157eda98851f5e0678' 
  AND token = 'R/Q8hZcj2xFbBjiyNJ30RNBkNk41kJhbuhOR9YcJ4dA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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