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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd017de0e266a7940b87c9a5a1aa52ab7f889b84a4e4f37839e7c97e3234c49bf' 
  AND token = 'vxafn+i32CH+SUMLskHzlnx6RvSgL8zwH+ttY5zxrrA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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