Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1eee75d63d07e0ecf3e891ce19316d42c0fbbd80905994bcee2a04e53315fb0' 
  AND token = 'NmKTvh8JtOQApC3qY1qr2LNud8ggbg/C2zqr4nXQdow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}