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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c2446fa7f403da88c329ee551239832db4304235d86664c417dc2e9b155c528' 
  AND token = 'IQ/ptN64N5qGT98nvYVu/mqOvkN/6MExfu8rUp9IATU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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