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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69732587661e2a818de33ab75785b4a6ecfa2bba6e681c65d78da67ff8116eda' 
  AND token = 'Q/OqKSo1mqaZ73pnrQAaI86lBUt3UzlTs26ySfgaEcs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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