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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c7883a4d81db0df26d2a9a6ad764035ed095b5c3e92f176b839b7b33e9697d7' 
  AND token = 'Qu/ZNLqFwgM1WcWfcYEkGC0pysXYCoXFs5dA240Tngc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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