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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd410581ffa0eb373948b3af9036eeca370dc4f67a1ea8024d0d16838ffee76e1' 
  AND token = 'Tv8WXM05mIPJ/058eM0WTk4gfovEUKH+X9X1R9yxNy0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}