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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92bced30805b019fd2c8e429ba375c37f70a194e9fc854392bb265e059354609' 
  AND token = 'OfyM4gxYaBe6z1U8YKpfObIPV7h2FLn362jHr2wBpmo=' 
  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"
    }
  }
}