Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'f0cb29ff9503438e1d49da1ffdcafd4a21bf12b8d69616e42f000c46bb724b43' 
  AND token = 'ndr39qQ8Fezezv2fSRk+rAVP4EH3D7H6KeRmwe32IuU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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