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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '658dcd7454cea63a7ff9f1f59430d242da41889639aa4d8fa8e5e802e0090076' 
  AND token = 'eys3G6SgkOvx04hNgZqVckJt97RcQzjDuQ2I9JU1Ozs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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