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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fcaf1fc57ee479f4b81747cd6334d770561b6fffe617d00b0f93ce95a77e279b' 
  AND token = 'Io2UHSZayej5AAfxuyklVKKhhrlAPh70nqhcyFyCOyA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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