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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f328337e5d32c47b3718e87c3327f6f3ae8e039710af4de98127583b00cb863' 
  AND token = 'FRivb8nE+MF4eE1QGZF+GS8OOJK7GNdqVwbf3D+hL4Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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