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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '416fb482dd6af01ead18e5cfe1353d8a61f557041004d3023a49fc15fd30face' 
  AND token = 'ofbyhRx2G5to0MWcFQDjYsmzFrDB2SEEuefmsfLPcEA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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