Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ecab432ea9072c8f94da778db622ac53a469818d3bcea65be87ea6279cf2e397' 
  AND token = '9XLpf2dB5juY2BxwQdvBRomx5s0TM7wTDWndhkziKJE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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