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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c12d97c79fedc9f896ffe3df76f163fa1d8effd29cf6f9e3e43d8cb462cd434' 
  AND token = 'rT3l5b8DWEgrch3xTyx+yRXeVEBuLFyZKJ8BgYx9akc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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