SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '62eccca328f75d08d9e57769e7d3db803386fc11b7f76cd1f3c4c2ab605d87a6' 
  AND token = 'giH/UCdpXXVjqDHzgRpI2cJgaTZ9uUhwBEdHW3pnO48=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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