Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '52a62e5e777c9659190939b49c56b4035e15ec76539c6129b0684219d2242b0e' 
  AND token = '22QAxHATlJUSnXApPcRFeQ59Cr39cVR6aLtlmskCbhc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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