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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2ec48bfb93cef0a5ee58c82d2e3a6b9633184cffc5022bf64ee42c5026e87a8a' 
  AND token = 'w980zwfVX2xX6spbrZGsbUTAjdr4GulvIspekdbwv7M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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