SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '06094147b8991f215386e826fa5d8c2896ceb55ba68f9782b4c2d204d6a78e2e' 
  AND token = 'uhz+PLH0ef4On56vI+PHpcKZvghJP2XsmHRE+e1uFMU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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