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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ee08d1e52a3193c0980c3326f130ef1acf5884df2d48a8bbc10cbd588c1a686' 
  AND token = 'g6g/qHMa80E6Yf1HTZCq/Hqx6veibxfU9G5DuraYRhY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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