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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7dae400f43b0502d12ed721e25e78df87898dd6e098c1fe0a0d8001b05e01c7f' 
  AND token = '2nNvrV7IWsHQVtLHC+GHJxyZJJ5JrzIdGSGmVn59KKc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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