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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e232340d74dbc7a3c8f13f0eaf9bc5f61044deebd0fdc0daa0f26e64d6a7b241' 
  AND token = 'CAoWXoM1S0PR70NM20CGjemDwfw7ly3D3M43B0sVl1o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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