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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '069b7de2676b6f9a724cb027dfc0f8a63702b019f8c51e4484c88bae10744f4b' 
  AND token = 'WMNFmXmyv7/6HIkuZ3kSZi4HJovuLuz5k6hFP+M2TL0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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