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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f8228c641bcffe3d710f65b0ebf9b07679911db84b6e419a9e6be5dd62a1b03' 
  AND token = 'J4PMPuY54w7WfS2WWtgptaLGmMmevt+3vSRGDyu49Hc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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