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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1dc08b0c7d3cdb4a202fdc8646c8cd43fb9bb0f8661cd4cc2fecd412f64148df' 
  AND token = 'N2367fzjZc2SX20xlh+/QHjAxHBz7Lv48/uE8gmadBw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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