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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2aee67b9d2b32ba7bb610f388b8cd7b8b5a5deb0e2b8a5fdeffef3d8b6ac1693' 
  AND token = 'zy00v+uN90k3K083D373icw4I4B5d3XRgyEaW/bUhi8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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